Under what circumstances are people the happiest?

Revenge, for example, follows the emotional impulse generated by dopamine to make choices.

There is also the type of killing that is carried out without psychological burden.

For example, the current Chen Cao.

Chen Cao is frantically killing the monsters of this underground lake at the moment.

This kind of liberating nature, freeing oneself to kill.

Chen Cao did not have the psychological burden of killing people at all.

There was no mercy and mercy in my heart when I killed any other small animals.

Chen Cao's killing was completely arbitrary.

There is a completely different ecosystem than the ground, and there are also completely different biological characteristics from the ground.

One of the characteristics is that it is large.

Chen Cao killed dozens of giant creatures, but all of them were white liquid, which was diluted earth essence.

There wasn't a monster of the level of a great spider demon, and there wasn't a single golden substance.

The dozens of giant creatures that Chen Cao killed were not as pure as the earth essence that a great spider demon provided to Chen Cao.

Chen Cao stopped killing, and Chen Cao tossed and turned in the lake water to check it over and over again.

There are no more powerful creatures in this lake.

Unless Chen Cao killed all the creatures in the entire underground lake, he would not be able to make up a golden substance.

Aside from those monsters, this underground lake is actually pretty good.

The scenery here is definitely an extraordinary experience if the average tourist can come here.

Of course, this situation is impossible to happen, except for Chen Cao, it is estimated that Gaia has the ability to come here.

No one else would have been able to get here.

Chen Cao also found a dark river on the other side of the lake.

So Chen Cao planned to go into that dark river to investigate.

See if you'll be able to go deeper underground.

Not long after Chen Cao entered the dark river, he arrived at an underground waterfall.

The drop of more than 30 meters is nothing to Chen Cao.

But below the waterfall is the magma lake, and the lake falls above the magma lake, and it evaporates before it falls.

Water vapor is then formed.

The water vapor that Chen Cao encountered before should have been formed here.

Chen Cao stood on top of the waterfall and looked at the magma lake below.

The temperature down there is so high that the water from the waterfall evaporates before it hits the ground, so you can imagine how hot it is.

Even if it is Chen Cao, if he falls in this magma lake, it is estimated that it will only take a minute to be roasted.

The field of high temperature and sky fire here is a completely different concept.

Although the temperature of the Heavenly Fire Field is also high, the Heavenly Fire can be absorbed.

But the magma here will directly burn Chen Cao to death.

Chen Cao's Dark Essence can be assimilated with magma.

However, this is when there is a lot of dark stock solution and little magma.

But how much energy is contained in the large magma lake below?

If the dark essence seeps into the magma, I am afraid that it is not the dark essence that assimilates the magma, but the magma that assimilates the dark liquid.

At this moment, Chen Cao saw a figure moving in the magma.

That figure is more than ten meters long, and in terms of body length or body shape, it is not very large.

But from a distance of hundreds of meters, Chen Cao could still feel the breath of that creature.

This creature looks a lot like the legendary plesiosaur.

However, plesiosaurs lived in water, not lava.

Chen Cao silently judged what the strength of that plesiosaur-like creature was.

This plesiosaur's aura is stronger than that of the Great Spider Demon.

That means that it has a high-purity earth essence on its body.

Suddenly, the plesiosaur lifted its long neck from the lava and spewed a mouthful of magma from its mouth.

Chen Cao avoided the magma, and the guy found himself.

And this guy's personality is really irritable enough, and he actually took the initiative to attack himself.

But it's only natural to think about it.

All the creatures you encounter underground will take the initiative to attack.

The Underworld is a world of the jungle.

However, it was not easy for Chen Cao to kill that creature.

It wanders in the lava, but Chen Cao can't resist the lava.

What to do?

Chen Cao thought about it, and he suddenly thought of a way.

Widen the river and bring more water to the lake to extinguish the lava lake.

Of course, it is certainly impossible to be extinguished forever.

After all, for such a large magma lake to be formed here, there must be a leyline link.

But in a short time, it's still possible.

After all, the underground lake has a very large amount of water, and the only outlet is this dark river.

If you let the underground lake flood with a lot of water, you can reduce the temperature in a very short time.

Chen Cao turned back along the dark river again, and then at the entrance of the dark river, he directly used violent means to completely destroy the entrance.

Chen Cao used the dark magma like a tunnel drilling machine, spinning wildly to cut the cave of the dark river.

In an instant, an even larger amount of water poured into the river.

However, the amount of water in the underground lake is very large, and even if the dark river is expanded, the water level here has not dropped significantly.

Chen Cao returned to the waterfall and watched as a large amount of water rushed into the lava lake.

A large fog of water vapor was formed, which shrouded the entire sky over the magma lake.

There was a sizzling sound everywhere.

Soon, the lake began to occupy the magma lake.

Chen Cao waited for half an hour, and the water had already begun to accumulate below.

But the water below is all boiling.

Just boiling water, Chen Cao jumped straight down.

The current temperature is already within the acceptable range of Chen Cao.

At this moment, a plesiosaur suddenly emerged from the mist and pounced towards Chen Cao.

Not dead yet?

Chen Cao was a little surprised, originally Chen Cao thought that this plesiosaur should not be able to survive in the water due to the temperature of magma.

But the result was unexpected, this plesiosaur monster was still alive.

Chen Cao's all-out blow directly shattered the plesiosaur's head.

Sure enough, a golden substance was found in the carcass of the plesiosaur.

Chen Cao couldn't help but ingest the golden substance.

After the golden substance was absorbed into the body, it was integrated into Chen Cao's lower dantian.

This golden substance is the essence of the earth in high purity.

And the earth essence is not only the main ingredient for cultivating into the Mixed Yuan Void Ming, but also can strengthen the physical fitness.

In fact, I heard the old turtle say so much about the mixed yuan Kongming before, and to put it bluntly, it is a knot.

Chen Cao was about to condense the essence of the earth, when suddenly another larger plesiosaur appeared and bit towards Chen Cao.

Chen Cao was taken aback, there is another one?

Wrong...... Another ...... appeared Another one appeared.

Chen Cao discovered that the entire magma lake was actually the lair of plesiosaurs, and there were countless plesiosaurs here.

And after the environment was deliberately destroyed by Chen Cao, all the plesiosaurs here came out.

These plesiosaurs seem to be well adapted to the steamy environment here.

This made Chen Cao have to suspect that in fact, it was not the first time that the lake water had been poured into the magma lake.

It's possible that this was a cycle, so plesiosaurs could fully adapt to the environment.

But it's pointless to think about this now, what Chen Cao needs to do now is to kill all these plesiosaurs.